625154009 has 2 divisors, whose sum is σ = 625154010. Its totient is φ = 625154008.

The previous prime is 625153987. The next prime is 625154021. The reversal of 625154009 is 900451526.

It is a happy number.

625154009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 532455625 + 92698384 = 23075^2 + 9628^2 .

It is a cyclic number.

It is not a de Polignac number, because 625154009 - 2²⁴ = 608376793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625154609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312577004 + 312577005.

It is an arithmetic number, because the mean of its divisors is an integer number (312577005).

Almost surely, 2^625154009 is an apocalyptic number.

It is an amenable number.

625154009 is a deficient number, since it is larger than the sum of its proper divisors (1).

625154009 is an equidigital number, since it uses as much as digits as its factorization.

625154009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 625154009 is about 25003.0799902732. The cubic root of 625154009 is about 855.0581946870.

The spelling of 625154009 in words is "six hundred twenty-five million, one hundred fifty-four thousand, nine".